We find a condition for a Borel mapping which implies that the Hausdorff dimension of is less than or equal to m-n for almost all .
@article{bwmeta1.element.bwnjournal-article-cmv67i2p217bwm, author = {Piotr Haj\l asz}, title = {A Sard type theorem for Borel mappings}, journal = {Colloquium Mathematicae}, volume = {67}, year = {1994}, pages = {217-221}, zbl = {0834.28002}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-cmv67i2p217bwm} }
Hajłasz, Piotr. A Sard type theorem for Borel mappings. Colloquium Mathematicae, Tome 67 (1994) pp. 217-221. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-cmv67i2p217bwm/
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